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国内典型烤烟烟叶的燃烧行为与动力学特性研究

2015-10-21张亚平宁敏周顺王孝峰何庆佘世科鲍穗田振峰陈开波

安徽农业科学 2015年3期

张亚平 宁敏 周顺 王孝峰 何庆 佘世科 鲍穗 田振峰 陈开波

摘要 采用热重分析法,全面考察了37个不同产地部位的国内典型烤烟烟叶在4个不同升温速率下的燃烧行为。结果表明,烤烟热解主要分为失水、挥发份析出与燃烧、焦炭燃烧与燃尽阶段;升温速率的改变对TG/DTG曲线产生明显的影响。运用KAS法对烤烟在热解过程中的不同转化率下进行动力学分析,给出了所有样品不同阶段的活化能分布,并且发现低温段的活化能高于高温段。最后,对比分析了不同产地、部位活化能的分布情况。

關键词 烤烟烟叶;热重分析;燃烧行为;动力学分析

中图分类号 S572  文献标识码 A  文章编号 0517-6611(2015)03-200-06

Investigation on the Combustion Behaviors and Kinetic Characteristics of National Typical Fluecured Tobacco Leaves

ZHANG Yaping, NING Min*, ZHOU Shun et al

(China Tobacco Anhui Industrial Co., Ltd., Hefei, Anhui 230088)

Abstract An indepth investigation was conducted on the combustion behaviors of 37 national typical fluecured tobacco leaves at 4 different heating rates using thermogravimetric analysis (TGA). The results showed that the whole process was divided into 3 stages: dehydration, volatilization, char combustion and burnout. The changes of heating rates heavily affected the trends of TG/DTG lines. The KAS method was used to conduct the kinetic analysis in a wide range of conversions(0.15-0.90), from which the activation energy distribution of the whole pyrolysis process was obtained. It was found that the activation energy during the low temperature stage was higher than the ones during the high temperature stage. Finally, the activation energy distribution of different localities and locations of 37 tobacco leaves was compared and analyzed

Key words Fluecured tobacco; Thermogravimetric analysis; Combustion behaviors; Kinetic characteristics

基金项目 安徽中烟工业有限责任公司科技项目(20121026)。

作者简介 张亚平(1987- ),男, 安徽六安人, 工程师,硕士,从事新型烟草制品和烟草燃烧化学研究。*通讯作者,高级工程师,硕士,从事烟草化学研究。

收稿日期 20141205

卷烟作为一种特殊的消费品,其吸食品质是通过燃烧后产生的烟气来反映的。在卷烟抽吸过程中,烟草组分在贫氧气氛下经历复杂的动态热解燃烧过程[1]。近年来,在卷烟燃烧方面的研究日趋广泛,汪波等、沈凯等[2-3]通过向烟草中添加钾盐来研究此类添加剂在降低烟草燃烧温度方面的作用及其机理。此类研究多集中于某类单体物质对烟草燃烧的影响。王红波等考察对比了烤烟、白肋烟、香料烟、膨胀烟丝、膨胀梗丝和再造烟叶,以及不同产地烤烟烟叶的热解特性差异[4];钟仙……

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